Ethiopia will skip the latest round of U.S.-brokered talks this week on a disputed Nile dam project with Egypt and Sudan, the country’s water ministry announced Wednesday.

A final deal on the massive Great Ethiopian Renaissance Dam had been expected this month, but U.S. Secretary of State Mike Pompeo said in his Ethiopia visit last week that an agreement now might take months as "a great deal of work remains."

The dispute over what will be Africa’s largest hydroelectric dam pits Ethiopia’s desire to pull millions out of poverty against Egypt’s concerns over a critical water supply.

Ethiopia will skip the talks in Washington "because the country’s delegation hasn’t concluded its consultation with relevant stakeholders," the ministry of water, irrigation and energy said on its Facebook page. "The decision has been communicated with the U.S. Treasury secretary."

The announcement came amid widespread concerns in Ethiopia that its delegation had been pressured by the U.S. to reach a deal on a $4.6 billion dam that is nearing completion. The U.S. became involved in the talks at Egypt’s invitation.

Egypt wants the dam to be filled more slowly to reduce restrictions on the flow of the Nile. Ethiopia says the dam is needed to provide electricity for development. In January it announced that it will start filling the dam, now more than 70% complete, in July at the start of the rainy season.